I know how it is work. Choose a random number. For example 14. 14-(1+4)=9=9*1. Choose another number. 76-(7+6)=63=9*7. Every number which we can show as 9*n has the same icon. The icon changes with every new game. And it is shown as a result every time. No magic, only Maths.

Hello. Let me explain how does this thing work. Every result you can get after the actions he suggests you to do can be divided by 9. And every single symbol in the table that matches a number that can be divided by 9 is the same. The symbols change every go. Thank you.

Yes, he got it right. He just knows all the possible results and puts for them the same symbol. Then, he shows you that symbol. Actually, he can never be wrong the only possible thing is that you calculated wrong. I really like this idea and good job to the person who created this game :)